moving trunk for module inkscape

(bzr r1)

1 files changed, 450 insertions, 0 deletions

diff --git a/src/selection.cpp b/src/selection.cpp
new file mode 100644
index 000000000..4c99885eb
--- /dev/null
+++ b/src/selection.cpp
@@ -0,0 +1,450 @@
+/** \file
+ * Per-desktop selection container
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   MenTaLguY <mental@rydia.net>
+ *   bulia byak <buliabyak@users.sf.net>
+ *
+ * Copyright (C) 2004-2005 MenTaLguY
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 2001-2002 Ximian, Inc.
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include "macros.h"
+#include "inkscape-private.h"
+#include "desktop.h"
+#include "desktop-handles.h"
+#include "document.h"
+#include "selection.h"
+#include "xml/repr.h"
+
+#include "sp-shape.h"
+
+
+#define SP_SELECTION_UPDATE_PRIORITY (G_PRIORITY_HIGH_IDLE + 1)
+
+namespace Inkscape {
+
+Selection::Selection(SPDesktop *desktop) :
+    _objs(NULL),
+    _reprs(NULL),
+    _items(NULL),
+    _desktop(desktop),
+    _flags(0),
+    _idle(0)
+{
+    clearOnceInaccessible(&_desktop);
+}
+
+Selection::~Selection() {
+    _clear();
+    _desktop = NULL;
+    if (_idle) {
+        g_source_remove(_idle);
+        _idle = 0;
+    }
+}
+
+void
+Selection::_release(SPObject *obj, Selection *selection)
+{
+    selection->remove(obj);
+}
+
+/* Handler for selected objects "modified" signal */
+
+void
+Selection::_schedule_modified(SPObject *obj, guint flags, Selection *selection)
+{
+    if (!selection->_idle) {
+        /* Request handling to be run in _idle loop */
+        selection->_idle = g_idle_add_full(SP_SELECTION_UPDATE_PRIORITY, GSourceFunc(&Selection::_emit_modified), selection, NULL);
+    }
+
+    /* Collect all flags */
+    selection->_flags |= flags;
+}
+
+gboolean
+Selection::_emit_modified(Selection *selection)
+{
+    /* force new handler to be created if requested before we return */
+    selection->_idle = 0;
+    guint flags = selection->_flags;
+    selection->_flags = 0;
+
+    selection->_emitModified(flags);
+
+    /* drop this handler */
+    return FALSE;
+}
+
+void Selection::_emitModified(guint flags) {
+    inkscape_selection_modified(this, flags);
+    _modified_signal.emit(this, flags);
+}
+
+void Selection::_emitChanged() {
+    inkscape_selection_changed(this);
+    _changed_signal.emit(this);
+}
+
+void Selection::_invalidateCachedLists() {
+    g_slist_free(_items);
+    _items = NULL;
+
+    g_slist_free(_reprs);
+    _reprs = NULL;
+}
+
+void Selection::_clear() {
+    _invalidateCachedLists();
+    while (_objs) {
+        SPObject *obj=reinterpret_cast<SPObject *>(_objs->data);
+        sp_signal_disconnect_by_data(obj, this);
+        _objs = g_slist_remove(_objs, obj);
+    }
+}
+
+bool Selection::includes(SPObject *obj) const {
+    if (obj == NULL)
+        return FALSE;
+
+    g_return_val_if_fail(SP_IS_OBJECT(obj), FALSE);
+
+    return ( g_slist_find(_objs, obj) != NULL );
+}
+
+void Selection::add(SPObject *obj) {
+    g_return_if_fail(obj != NULL);
+    g_return_if_fail(SP_IS_OBJECT(obj));
+
+    if (includes(obj)) {
+        return;
+    }
+
+    _invalidateCachedLists();
+    _add(obj);
+    _emitChanged();
+}
+
+void Selection::_add(SPObject *obj) {
+    // unselect any of the item's ancestors and descendants which may be selected
+    // (to prevent double-selection)
+    _removeObjectDescendants(obj);
+    _removeObjectAncestors(obj);
+
+    _objs = g_slist_prepend(_objs, obj);
+    g_signal_connect(G_OBJECT(obj), "release",
+                     G_CALLBACK(&Selection::_release), this);
+    g_signal_connect(G_OBJECT(obj), "modified",
+                     G_CALLBACK(&Selection::_schedule_modified), this);
+
+    /*
+    if (!SP_IS_SHAPE(obj)) {
+        printf("This is not a shape\n");
+    }
+    */
+}
+
+void Selection::set(SPObject *object) {
+    _clear();
+    add(object);
+}
+
+void Selection::toggle(SPObject *obj) {
+    if (includes (obj)) {
+        remove (obj);
+    } else {
+        add(obj);
+    }
+}
+
+void Selection::remove(SPObject *obj) {
+    g_return_if_fail(obj != NULL);
+    g_return_if_fail(SP_IS_OBJECT(obj));
+    g_return_if_fail(includes(obj));
+
+    _invalidateCachedLists();
+    _remove(obj);
+    _emitChanged();
+}
+
+void Selection::_remove(SPObject *obj) {
+    sp_signal_disconnect_by_data(obj, this);
+    _objs = g_slist_remove(_objs, obj);
+}
+
+void Selection::setList(GSList const *list) {
+    _clear();
+
+    if ( list != NULL ) {
+        for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
+            _add(reinterpret_cast<SPObject *>(iter->data));
+        }
+    }
+
+    _emitChanged();
+}
+
+void Selection::addList(GSList const *list) {
+
+    if (list == NULL)
+        return;
+
+    _invalidateCachedLists();
+
+    for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
+        SPObject *obj = reinterpret_cast<SPObject *>(iter->data);
+        if (includes(obj)) {
+            continue;
+        }
+        _add (obj);
+    }
+
+    _emitChanged();
+}
+
+void Selection::setReprList(GSList const *list) {
+    _clear();
+
+    for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
+        SPObject *obj=_objectForXMLNode(reinterpret_cast<Inkscape::XML::Node *>(iter->data));
+        if (obj) {
+            _add(obj);
+        }
+    }
+
+    _emitChanged();
+}
+
+void Selection::clear() {
+    _clear();
+    _emitChanged();
+}
+
+GSList const *Selection::list() {
+    return _objs;
+}
+
+GSList const *Selection::itemList() {
+    if (_items) {
+        return _items;
+    }
+
+    for ( GSList const *iter=_objs ; iter != NULL ; iter = iter->next ) {
+        SPObject *obj=reinterpret_cast<SPObject *>(iter->data);
+        if (SP_IS_ITEM(obj)) {
+            _items = g_slist_prepend(_items, SP_ITEM(obj));
+        }
+    }
+    _items = g_slist_reverse(_items);
+
+    return _items;
+}
+
+GSList const *Selection::reprList() {
+    if (_reprs) { return _reprs; }
+
+    for ( GSList const *iter=itemList() ; iter != NULL ; iter = iter->next ) {
+        SPObject *obj=reinterpret_cast<SPObject *>(iter->data);
+        _reprs = g_slist_prepend(_reprs, SP_OBJECT_REPR(obj));
+    }
+    _reprs = g_slist_reverse(_reprs);
+
+    return _reprs;
+}
+
+SPObject *Selection::single() {
+    if ( _objs != NULL && _objs->next == NULL ) {
+        return reinterpret_cast<SPObject *>(_objs->data);
+    } else {
+        return NULL;
+    }
+}
+
+SPItem *Selection::singleItem() {
+    GSList const *items=itemList();
+    if ( items != NULL && items->next == NULL ) {
+        return reinterpret_cast<SPItem *>(items->data);
+    } else {
+        return NULL;
+    }
+}
+
+Inkscape::XML::Node *Selection::singleRepr() {
+    SPObject *obj=single();
+    return obj ? SP_OBJECT_REPR(obj) : NULL;
+}
+
+NRRect *Selection::bounds(NRRect *bbox) const
+{
+    g_return_val_if_fail (bbox != NULL, NULL);
+    NR::Rect const b = bounds();
+    bbox->x0 = b.min()[NR::X];
+    bbox->y0 = b.min()[NR::Y];
+    bbox->x1 = b.max()[NR::X];
+    bbox->x1 = b.max()[NR::Y];
+    return bbox;
+}
+
+NR::Rect Selection::bounds() const
+{
+    GSList const *items = const_cast<Selection *>(this)->itemList();
+    if (!items) {
+        return NR::Rect(NR::Point(0, 0), NR::Point(0, 0));
+    }
+
+    GSList const *i = items;
+    NR::Rect bbox = sp_item_bbox_desktop(SP_ITEM(i->data));
+
+    while (i != NULL) {
+        bbox = NR::Rect::union_bounds(bbox, sp_item_bbox_desktop(SP_ITEM(i->data)));
+        i = i->next;
+    }
+
+    return bbox;
+}
+
+NRRect *Selection::boundsInDocument(NRRect *bbox) const {
+    g_return_val_if_fail (bbox != NULL, NULL);
+
+    GSList const *items=const_cast<Selection *>(this)->itemList();
+    if (!items) {
+        bbox->x0 = bbox->y0 = bbox->x1 = bbox->y1 = 0.0;
+        return bbox;
+    }
+
+    bbox->x0 = bbox->y0 = 1e18;
+    bbox->x1 = bbox->y1 = -1e18;
+
+    for ( GSList const *iter=items ; iter != NULL ; iter = iter->next ) {
+        SPItem *item=SP_ITEM(iter->data);
+        NR::Matrix const i2doc(sp_item_i2doc_affine(item));
+        sp_item_invoke_bbox(item, bbox, i2doc, FALSE);
+    }
+
+    return bbox;
+}
+
+NR::Rect Selection::boundsInDocument() const {
+    NRRect r;
+    return NR::Rect(*boundsInDocument(&r));
+}
+
+/**
+ * Compute the list of points in the selection that are to be considered for snapping.
+ */
+std::vector<NR::Point> Selection::getSnapPoints() const {
+    GSList const *items = const_cast<Selection *>(this)->itemList();
+    std::vector<NR::Point> p;
+    for (GSList const *iter = items; iter != NULL; iter = iter->next) {
+        sp_item_snappoints(SP_ITEM(iter->data), SnapPointsIter(p));
+    }
+
+    return p;
+}
+
+std::vector<NR::Point> Selection::getSnapPointsConvexHull() const {
+    GSList const *items = const_cast<Selection *>(this)->itemList();
+    std::vector<NR::Point> p;
+    for (GSList const *iter = items; iter != NULL; iter = iter->next) {
+	sp_item_snappoints(SP_ITEM(iter->data), SnapPointsIter(p));
+    }
+    
+    std::vector<NR::Point>::iterator i; 
+    NR::ConvexHull cvh(*(p.begin()));
+    for (i = p.begin(); i != p.end(); i++) {
+	// these are the points we get back
+	cvh.add(*i); 
+    }
+    
+    NR::Rect rHull = cvh.bounds(); 
+    std::vector<NR::Point> pHull(4); 
+    pHull[0] = rHull.corner(0); 
+    pHull[1] = rHull.corner(1); 
+    pHull[2] = rHull.corner(2); 
+    pHull[3] = rHull.corner(3); 
+
+    return pHull;
+}
+
+std::vector<NR::Point> Selection::getBBoxPoints() const {
+    GSList const *items = const_cast<Selection *>(this)->itemList();
+    std::vector<NR::Point> p;
+    for (GSList const *iter = items; iter != NULL; iter = iter->next) {
+        NR::Rect b = sp_item_bbox_desktop(SP_ITEM(iter->data));
+        p.push_back(b.min());
+        p.push_back(b.max());
+    }
+
+    return p;
+}
+
+void Selection::_removeObjectDescendants(SPObject *obj) {
+    GSList *iter, *next;
+    for ( iter = _objs ; iter ; iter = next ) {
+        next = iter->next;
+        SPObject *sel_obj=reinterpret_cast<SPObject *>(iter->data);
+        SPObject *parent=SP_OBJECT_PARENT(sel_obj);
+        while (parent) {
+            if ( parent == obj ) {
+                _remove(sel_obj);
+                break;
+            }
+            parent = SP_OBJECT_PARENT(parent);
+        }
+    }
+}
+
+void Selection::_removeObjectAncestors(SPObject *obj) {
+        SPObject *parent=SP_OBJECT_PARENT(obj);
+        while (parent) {
+            if (includes(parent)) {
+                _remove(parent);
+            }
+            parent = SP_OBJECT_PARENT(parent);
+        }
+}
+
+SPObject *Selection::_objectForXMLNode(Inkscape::XML::Node *repr) const {
+    g_return_val_if_fail(repr != NULL, NULL);
+    gchar const *id = repr->attribute("id");
+    g_return_val_if_fail(id != NULL, NULL);
+    SPObject *object=SP_DT_DOCUMENT(_desktop)->getObjectById(id);
+    g_return_val_if_fail(object != NULL, NULL);
+    return object;
+}
+
+guint Selection::numberOfLayers() {
+      GSList const *items = const_cast<Selection *>(this)->itemList();
+	GSList *layers = NULL;
+	for (GSList const *iter = items; iter != NULL; iter = iter->next) {
+		SPObject *layer = desktop()->layerForObject(SP_OBJECT(iter->data));
+		if (g_slist_find (layers, layer) == NULL) {
+			layers = g_slist_prepend (layers, layer);
+		}
+	}
+	guint ret = g_slist_length (layers);
+	g_slist_free (layers);
+	return ret;
+}
+
+}
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :